Microsoft today announced the availability date for Windows 10 as July 29. Microsoft has designed Windows 10 to run on broadest device family ever, including Windows PCs, Windows tablets, Windows phones, Windows for the Internet of Things, Microsoft Surface Hub, Xbox One and Microsoft HoloLens. It will be a free upgrade to all Windows 7 SP1 and Windows 8.1 users. After the release on July 29th, Microsoft will continue to update Windows 10 over time with new features and these updates will also be free.
Windows 10 PC from your favorite retailer. If you purchase a new Windows 8.1 device between now and then, the Windows 10 upgrade will be available to you and many retail stores will upgrade your new device for you.
The Windows 10 upgrade is designed to be compatible with your current Windows device and applications*. We are hard at work to make this upgrade process a great experience. You can reserve your free Windows 10 upgrade now through a simple reservation process. Look for this icon in your system tray at the bottom of your screen, simply click on the icon, and then complete the reservation process. You can find more details on how this works at Windows.com.
via: Windows blog